其实相对布局实现老师需要的效果也很简单，老师当时想多了！

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.zp.postandgetlearning.MainActivity">

    <TextView
        android:layout_alignParentTop="true"
        android:id="@+id/text_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="name" />
    <EditText
        android:layout_toRightOf="@id/text_name"
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:layout_marginTop="24dp"
        android:layout_below="@id/text_name"
        android:id="@+id/text_age"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="age" />
    <EditText
        android:layout_alignStart="@id/name"
        android:layout_below="@id/name"
        android:layout_toRightOf="@id/text_age"
        android:id="@+id/age"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:text="注册"
        android:layout_marginTop="24dp"
        android:layout_below="@id/text_age"
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</RelativeLayout>